Jonathan Cainer (18 December 1957 – 2 May 2016) was a British astrologer. He wrote astrological predictions six days a week for the Daily Mail, and forecasts for three Australian newspapers: the Sydney Daily Telegraph, the Melbourne Herald Sun, and the Perth Sunday Times. Cainer's predictions were also published in Hello, the Auckland Sunday News, the Botswana Echo, and Misty Magazine (Japan). It has been estimated that over twelve million people read his predictions.
